568A vs. 568B. Which should you use?

There are two accepted standards for 8-wire data network jacks (commonly and
incorrectly called "RJ-45.")

ANSI/TIA/EIA-568-B "Commercial Building
Telecommunications Cabling Standard" lists both wiring configurations. T568B is
the most prevalent for commercial installations, and was used by AT&T for the
original Merlin phone systems. To help you remember, associate "B" with "Bell."

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